?密封裝置功用：防止液壓油的泄漏 對密封裝置的要求：良好的密封性、耐磨性、經(jīng)濟性 常見密封形式 （1）間隙密封 （2）密封圈密封 間隙密封密封原理：利用相對運動零件配合面之間的微小間隙來防止泄漏 間隙密封平衡槽作用 1）自動對中心，減小摩擦力 2）增大了泄漏阻力，減小了偏心量，提高了密封性能。
3）儲存油液，自動潤滑間隙密封特點應用 ∵ 結構簡單，摩擦阻力小，耐高溫，但泄漏較大，并且隨著時間的增加而增加，加工要求高 ∴ 主要用于尺寸小，壓力低，速度高的液壓缸或各種閥 密封圈類型：O、LX、Y、V型和組合式等 密封圈材料：耐油橡膠、尼龍 O型密封圈密封原理:密封圈的安裝變形用于密封 O型密封圈特點 ∵ O型圈截面為圓形，結構簡單，制造方便，密 封性能好，摩擦力小。
∴ 一般安裝在外圓或內圓上截面為矩形的溝槽 內以實現(xiàn)密封 又∵ O型圈一般為橡膠制成 運動密封（動）— p>10Mpa ∴ 壓力高時32Mpa， O型密封圈應用相當廣泛,既可用于動密封,又可用于靜密封 Y型密封圈密封原理:密封圈受油壓作用使兩唇張開并貼緊在軸或孔的表面實現(xiàn)密封。
Y型密封圈分類 根據(jù)截面長寬比例不同 分為寬斷面 和窄斷面 Y型密封圈特點 ∵ Y型圈靠唇邊張開后實現(xiàn)密封 ∴ 安裝時唇邊必須對著壓力油腔 又∵ Y型圈密封可靠，摩擦力小，壽命長 ∴ 常用于速度較高的液壓缸 Y型密封圈應用 寬斷面Y型密封圈：p<20Mpa 00 T在-30—+100 通常 窄斷面Y型密封圈：p<32Mpa 00 T在-30—+100 V型密封圈結構：截面為V型，由支承環(huán)、密封環(huán)、壓緊環(huán)疊合而成，開口面向高壓側。
V型密封圈密封原理：當壓緊環(huán)壓緊密封環(huán)時，支承環(huán)使密封環(huán)產(chǎn)生變形而實現(xiàn)密封 V型密封圈特點應用 ∵ V型密封圈是組合裝置 ∴ 密封效果良好，耐高壓，壽命長，增 加密封環(huán)可提高密封效果，但摩阻力增大，尺寸大，成本高。
故 常用于壓力較高p<50Mp），溫 度為-400—+800，運動速度較低的場合實現(xiàn)密封 油封的功用：設置在液壓泵或液壓馬達的伸軸處，對外防塵，對內防漏 油封的分類：骨架式、無骨架式 油管 ——傳遞工作液體 管接頭——連接油管與 油管 或元件 要 求：足夠的強度、良好的密封、較小的壓力損失、方便的裝拆性。
油管尺寸的計算 計算依據(jù)：q、p 計算參數(shù)：d、δ 公式：d=2√q/πv 對橡膠軟管，由p和d選標準 d算出后<中低壓，選標準規(guī)格 金屬管0、5 mm 管接頭要求：連接牢固、密封可靠、裝配方便、工藝性好、外形尺寸小、通油能力強。
管接頭分類 按接頭分 1 硬管接頭 2 插入快換式接頭 3 膠管接頭 4 快速接頭 按連接體形式分 普通細牙螺紋（高壓） 錐螺紋（中低壓） 90-L-075-KA-1-CD-60-S-3-T2-D-03-GBA-35-35-24 90L075KA1CD60S3T2D03GBA353524 90L075-KA-1-CD-60-S-3-T2-E-03-GBA-29-29-24 90L075KA1CD60S3T2E03GBA292924 90-L-075-KA-1-CD-60-S-3-T2-E-03-GBA-29-29-24 90L075KA1CD60S3T2E03GBA292924 90-L-075-KA-1-CD-60-S-4-S1-D-03-GBA-42-42-24 90L075KA1CD60S4S1D03GBA424224 90-L-075-KA-1-CD-80-L-3-S1-D-03-GBA-23-23-24 90L075KA1CD80L3S1D03GBA232324 90-L-075-KA-1-CD-80-L-4-S1-D-00-GBA-14-14-24 90L075KA1CD80L4S1D00GBA141424 90-L-075-KA-1-CD-80-L-4-S1-D-00-GBA-35-35-24 90L075KA1CD80L4S1D00GBA353524 90-L-075-KA-1-CD-80-P-3-C7-E-00-GBA-42-42-24 90L075KA1CD80P3C7E00GBA424224 90L075-KA-1-CD-80-R-3-C7-D-03-GBA-35-35-24 90L075KA1CD80R3C7D03GBA353524 90-L-075-KA-1-CD-80-R-3-C7-D-03-GBA-35-35-24 90L075KA1CD80R3C7D03GBA353524 90-L-075-KA-1-CD-80-R-3-S1-D-03-GBA-35-35-24 90L075KA1CD80R3S1D03GBA353524 90-L-075-KA-1-CD-80-R-3-S1-D-03-GBA-38-38-24 90L075KA1CD80R3S1D03GBA383824 90-L-075-KA-1-CD-80-R-4-C6-E-02-GBA-29-29-24 90L075KA1CD80R4C6E02GBA292924 90-L-075-KA-1-CD-80-R-4-S1-D-03-GBA-26-26-24 90L075KA1CD80R4S1D03GBA262624 90-L-075-KA-1-CD-80-R-4-S1-D-03-GBA-29-29-24 90L075KA1CD80R4S1D03GBA292924 90-L-075-KA-1-CD-80-R-4-S1-D-03-GBA-38-38-24 90L075KA1CD80R4S1D03GBA383824 90-L-075-KA-1-CD-80-R-4-S1-D-03-GBA-42-42-24 90L075KA1CD80R4S1D03GBA424224 90L075-KA-1-CD-80-S-3-C7-C-02-FAC-42-42-24 90L075KA1CD80S3C7C02FAC424224 90-L-075-KA-1-CD-80-S-3-C7-C-02-FAC-42-42-24 90L075KA1CD80S3C7C02FAC424224 90L075-KA-1-CD-80-S-3-C7-D-03-GBA-35-35-24 90L075KA1CD80S3C7D03GBA353524 90-L-075-KA-1-CD-80-S-3-C7-D-03-GBA-35-35-24 90L075KA1CD80S3C7D03GBA353524 90-L-075-KA-1-CD-80-S-3-C7-E-03-GBA-42-42-24 90L075KA1CD80S3C7E03GBA424224 90-L-075-KA-1-CD-80-S-3-S1-D-03-EBC-38-38-24 90L075KA1CD80S3S1D03EBC383824 90-L-075-KA-1-CD-80-S-3-S1-E-03-GBA-42-42-24 90L075KA1CD80S3S1E03GBA424224 90-L-075-KA-1-CD-80-S-4-S1-D-03-GBA-35-35-24 90L075KA1CD80S4S1D03GBA353524 90L075-KA-1-NN-60-L-3-C7-D-03-GBA-38-38-20 90L075KA1NN60L3C7D03GBA383820 90-L-075-KA-1-NN-60-L-3-C7-D-03-GBA-38-38-20 90L075KA1NN60L3C7D03GBA383820 90-L-075-KA-1-NN-60-L-3-S1-D-03-EBC-38-38-24 90L075KA1NN60L3S1D03EBC383824 90-L-075-KA-1-NN-60-P-3-C6-E-02-GBA-42-42-24 90L075KA1NN60P3C6E02GBA424224 90-L-075-KA-1-NN-60-P-3-C7-E-04-GBA-42-42-24 90L075KA1NN60P3C7E04GBA424224 90-L-075-KA-1-NN-60-P-3-S1-D-00-GBA-38-38-24 90L075KA1NN60P3S1D00GBA383824 90-L-075-KA-1-NN-60-P-3-S1-D-03-GBA-23-23-20 90L075KA1NN60P3S1D03GBA232320 90-L-075-KA-1-NN-60-P-3-S1-D-03-GBA-32-32-24 90L075KA1NN60P3S1D03GBA323224 90-L-075-KA-1-NN-60-P-3-S1-D-03-GBA-35-35-20 90L075KA1NN60P3S1D03GBA353520 90-L-075-KA-1-NN-60-P-3-S1-D-03-GBA-42-42-20 90L075KA1NN60P3S1D03GBA424220 90-L-075-KA-1-NN-60-P-3-S1-E-03-GBA-42-14-24 90L075KA1NN60P3S1E03GBA421424 90-L-075-KA-1-NN-60-P-3-T2-D-03-GBA-38-26-24 90L075KA1NN60P3T2D03GBA382624 90-L-075-KA-1-NN-60-R-3-S1-D-03-EBC-38-38-24 90L075KA1NN60R3S1D03EBC383824 90-L-075-KA-1-NN-60-R-3-S1-D-03-GBA-29-29-24 90L075KA1NN60R3S1D03GBA292924 90-L-075-KA-1-NN-60-R-3-S1-D-03-GBA-35-35-24 90L075KA1NN60R3S1D03GBA353524 90-L-075-KA-1-NN-60-R-4-S1-C-03-GBA-29-29-24 90L075KA1NN60R4S1C03GBA292924 90-L-075-KA-1-NN-60-R-4-S1-D-00-GBA-26-26-24 90L075KA1NN60R4S1D00GBA262624 90-L-075-KA-1-NN-60-R-4-S1-D-03-GBA-42-42-24 90L075KA1NN60R4S1D03GBA424224 90-L-075-KA-1-NN-60-S-3-C6-C-03-GBA-35-35-24 90L075KA1NN60S3C6C03GBA353524 90-L-075-KA-1-NN-60-S-3-C6-D-03-GBA-35-35-24 90L075KA1NN60S3C6D03GBA353524 90L075-KA-1-NN-60-S-3-C7-D-03-GBA-23-23-24 90L075KA1NN60S3C7D03GBA232324 90-L-075-KA-1-NN-60-S-3-C7-D-03-GBA-23-23-24 90L075KA1NN60S3C7D03GBA232324 90L075-KA-1-NN-60-S-3-C7-D-03-GBA-35-35-24 90L075KA1NN60S3C7D03GBA353524 90-L-075-KA-1-NN-60-S-3-C7-D-03-GBA-35-35-24 90L075KA1NN60S3C7D03GBA353524 90-L-075-KA-1-NN-60-S-3-S1-C-03-GBA-35-35-24 90L075KA1NN60S3S1C03GBA353524 90-L-075-KA-1-NN-60-S-3-S1-D-03-EBC-38-38-24 90L075KA1NN60S3S1D03EBC383824 90-L-075-KA-1-NN-60-S-3-S1-D-03-GBA-32-32-24 90L075KA1NN60S3S1D03GBA323224 90-L-075-KA-1-NN-60-S-3-S1-D-03-GBA-35-35-24 90L075KA1NN60S3S1D03GBA353524 90-L-075-KA-1-NN-60-S-3-S1-D-03-GBA-38-38-24 90L075KA1NN60S3S1D03GBA383824 90-L-075-KA-1-NN-60-S-3-S1-E-03-GBA-32-32-28 90L075KA1NN60S3S1E03GBA323228 90-L-075-KA-1-NN-60-S-3-S1-E-03-GBA-35-35-28 90L075KA1NN60S3S1E03GBA353528 90L075-KA-1-NN-60-S-4-C6-E-03-GBA-32-32-24 90L075KA1NN60S4C6E03GBA323224 90-L-075-KA-1-NN-60-S-4-C6-E-03-GBA-32-32-24 90L075KA1NN60S4C6E03GBA323224 90-L-075-KA-1-NN-60-S-4-S1-D-03-GBA-35-35-24 90L075KA1NN60S4S1D03GBA353524 90-L-075-KA-1-NN-60-S-4-S1-D-03-GBA-42-42-24 90L075KA1NN60S4S1D03GBA424224 90-L-075-KA-1-NN-60-S-4-S1-D-04-GBA-35-35-24 90L075KA1NN60S4S1D04GBA353524 90-L-075-KA-1-NN-61-P-3-S1-D-03-GBA-35-35-20 90L075KA1NN61P3S1D03GBA353520 90-L-075-KA-1-NN-80-D-4-S1-L-00-GBA-20-20-24 90L075KA1NN80D4S1L00GBA202024 90-L-075-KA-1-NN-80-D-4-S1-L-03-GBA-42-42-24 90L075KA1NN80D4S1L03GBA424224 90-L-075-KA-1-NN-80-L-3-S1-D-03-GBA-35-35-24 90L075KA1NN80L3S1D03GBA353524 90-L-075-KA-1-NN-80-L-3-S1-D-04-GBA-29-29-28 90L075KA1NN80L3S1D04GBA292928 90-L-075-KA-1-NN-80-P-3-S1-D-03-EBC-35-14-24 90L075KA1NN80P3S1D03EBC351424 90-L-075-KA-1-NN-80-P-3-S1-D-03-GBA-29-29-24 90L075KA1NN80P3S1D03GBA292924 90-L-075-KA-1-NN-80-P-3-S1-D-04-GBA-42-42-24 90L075KA1NN80P3S1D04GBA424224 90-L-075-KA-1-NN-80-P-3-S1-E-00-GBA-42-42-24 90L075KA1NN80P3S1E00GBA424224 90-L-075-KA-1-NN-80-P-4-S1-D-03-GBA-17-17-24 90L075KA1NN80P4S1D03GBA171724 90-L-075-KA-1-NN-80-P-4-S1-D-03-GBA-35-35-24 90L075KA1NN80P4S1D03GBA353524 90-L-075-KA-1-NN-80-P-4-S1-D-03-GBA-38-38-24 90L075KA1NN80P4S1D03GBA383824 90-L-075-KA-1-NN-80-R-3-C7-D-04-GBA-26-26-20 90L075KA1NN80R3C7D04GBA262620 90-L-075-KA-1-NN-80-R-3-C7-E-03-GBA-35-35-24 90L075KA1NN80R3C7E03GBA353524 90-L-075-KA-1-NN-80-R-3-S1-D-03-GBA-23-23-24 90L075KA1NN80R3S1D03GBA232324 90-L-075-KA-1-NN-80-R-3-S1-D-03-GBA-29-29-24 90L075KA1NN80R3S1D03GBA292924 90-L-075-KA-1-NN-80-R-3-S1-D-03-GBA-35-35-24 90L075KA1NN80R3S1D03GBA353524 90-L-075-KA-1-NN-80-R-3-S1-D-03-GBA-38-38-24 90L075KA1NN80R3S1D03GBA383824。
